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2024ApJ...967...50P - Astrophys. J., 967, 50 (2024/May-3)

JWST Photometric Time-delay and Magnification Measurements for the Triply Imaged Type Ia “SN H0pe” at z = 1.78.

PIEREL J.D.R., FRYE B.L., PASCALE M., CAMINHA G.B., CHEN W., DHAWAN S., GILMAN D., GRAYLING M., HUBER S., KELLY P., THORP S., ARENDSE N., BIRRER S., BRONIKOWSKI M., CANAMERAS R., COE D., COHEN S.H., CONSELICE C.J., DRIVER S.P., D'SILVA J.C.J., ENGESSER M., FOO N., GALL C., GARUDA N., GRILLO C., GROGIN N.A., HENDERSON J., HJORTH J., JANSEN R.A., JOHANSSON J., KAMIENESKI P.S., KOEKEMOER A.M., LARISON C., MARSHALL M.A., MOUSTAKAS L.A., NONINO M., ORTIZ III R., PETRUSHEVSKA T., PIRZKAL N., ROBOTHAM A., RYAN R.E.Jr, SCHULDT S., STROLGER L.G., SUMMERS J., SUYU S.H., TREU T., WILLMER C.N.A., WINDHORST R.A., YAN H., ZITRIN A., ACEBRON A., CHAKRABARTI S., COULTER D.A., FOX O.D., HUANG X., JHA S.W., LI G., MAZZALI P.A., MEENA A.K., PEREZ-FOURNON I., POIDEVIN F., REST A. and RIESS A.G.

Abstract (from CDS):

Supernova (SN) SN H0pe is a gravitationally lensed, triply imaged, Type Ia SN (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0 cluster of galaxies. Well-observed multiply imaged SNe provide a rare opportunity to constrain the Hubble constant (H0), by measuring the relative time delay between the images and modeling the foreground mass distribution. SN H0pe is located at z = 1.783 and is the first SN Ia with sufficient light-curve sampling and long enough time delays for an H0 inference. Here we present photometric time-delay measurements and SN properties of SN H0pe. Using JWST/NIRCam photometry, we measure time delays of Δtab = $-{116.6}_{-9.3}^{+10.8}$ observer-frame days and Δtcb = $-{48.6}_{-4.0}^{+3.6}$ observer-frame days relative to the last image to arrive (image 2b; all uncertainties are 1σ), which corresponds to a ∼5.6% uncertainty contribution for H0 assuming 70 km s–1 Mpc–1. We also constrain the absolute magnification of each image to μa = ${4.3}_{-1.8}^{+1.6}$, μb = ${7.6}_{-2.6}^{+3.6}$, μc = ${6.4}_{-1.5}^{+1.6}$ by comparing the observed peak near-IR magnitude of SN H0pe to the nonlensed population of SNe Ia.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Cosmology - Type Ia supernovae - Gravitational lensing - Galaxy clusters

Simbad objects: 5

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